/Engine/Source/Runtime/Core/Public/Delegates/DelegateInstancesImpl.h
template<typename RetValType, typename... ParamTypes, typename UserPolicy, typename FunctorType, typename... VarTypes> class TBaseFunctorDelegateInstance< RetValType(ParamTypes...), UserPolicy, FunctorType, VarTypes... > : public [TCommonDelegateInstanceState< RetValType(ParamTypes...), UserPolicy, VarTypes... >](API\Runtime\Core\Delegates\TCommonDelegateInstanceState)